With their successful sale of selling their damaged canned goods, Lum has went to buy all the damaged cans from the wholesaler that he can get. So far, the only person who has managed to guess the contents of the cans correctly has been grandpap. What’s his secret? Will he walk off with all the inventory of damaged cans for free?

Lum thinks it’s just a run of good luck, but Abner thinks its magic. Abner goes into detail over grandpap’s feats at guessing. The old gent doesn’t even touch, or shake the cans. All he does is call out the name, and that’s what’s inside the can every time.

Lum still thinks their idea of the grab bag sale is so good that it could spark a chain of stores, and shares a little about his visit to the wholesaler. Grandpap is back, and this time he has a wheel barrow to tote away his winnings from his guess work. Will he be a welcome customer, or will he be turned out of the store? Will Abner ever learn grandpap’s secret? Lum uses his power as Justice of the Peace to bring up a legal injunction to keep grandpap out of the store.